Tag: M.W=200-250

Wallraff, G. M. published the artcileSynthesis and lithographic performance of photosensitive poly(phenylquinoxaline)s and related structures, Synthetic Route of 18512-55-5, the publication is Polymeric Materials Science and Engineering (1992), 289-90, database is CAplus.

Two new photoimageable dielecs. are demonstrated which are based on poly(quinoxalone) (PPQ) and poly(phenylquinoxaline) using a chem. amplification scheme. The PPQ was shown to be a high contrast system and both systems were photodefinable at 514 and 426 nm, affording neg.-tone images. The extent of butyloxycarbonyl (BOC) cleavage was relatively low (<40%) compared to styrene-BOC systems presumably due to the presence of basic nitrogens in the heterocyclic backbone.

Polymeric Materials Science and Engineering published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C12H14IN, Synthetic Route of 18512-55-5.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Gao, Hong-Ying published the artcileIntermolecular On-Surface σ-Bond Metathesis, Formula: C18H10, the publication is Journal of the American Chemical Society (2017), 139(20), 7012-7019, database is CAplus and MEDLINE.

Silylation and desilylation are important functional group manipulations in solution-phase organic chem. that are heavily used to protect/deprotect different functionalities. Herein, we disclose the first examples of the σ-bond metathesis of silylated alkynes with aromatic carboxylic acids on the Ag(111) and Au(111) surfaces to give the corresponding terminal alkynes and silyl esters, which is supported by d. functional theory calculations and further confirmed by XPS anal. Such a protecting group strategy applied to on-surface chem. allows self-assembly structures to be generated from mols. that are inherently unstable in solution and in the solid state. This is shown by the successful formation of self-assembled hexaethynylbenzene at Ag(111). Furthermore, it is also shown that on the Au(111) surface this σ-bond metathesis can be combined with Glaser coupling to fabricate covalent polymers via a cascade process.

Journal of the American Chemical Society published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Formula: C18H10.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Goda, Mami published the artcileStructural analysis of subsidiary tar dyes contained in food red number 102, Formula: C10H9NO4S, the publication is Shokuhin Eiseigaku Zasshi (2013), 54(3), 188-197, database is CAplus and MEDLINE.

Three unknown colors (A1, A2 and A3) in Food red Number 102 (R102) were identified by LC-MS and NMR anal. Red dye A1 was azo rubine (AZO), which is not designated as a coloring agent in Japan. Red dye A2 was a structural isomer of Fast Red E (FRE), which is also not designated as a coloring agent in Japan. Red dye A3 was predicted to be an overreaction product of R102, possessing the R102 structural framework. Furthermore, AZO, which was assumed to have been produced by dimerization of a diazonium salt used as a synthetic intermediate of R102, was also identified in Food red Number 2 (R2).

Shokuhin Eiseigaku Zasshi published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Formula: C10H9NO4S.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Morisue, Mitsuhiko published the artcileA metal-lustrous porphyrin foil, Related Products of naphthyridine, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(77), 10703-10706, database is CAplus and MEDLINE.

A metal-lustrous, self-standing film, i.e., porphyrin foil, was formed from a glass-forming polymeric porphyrin. The amorphous glass nature of the porphyrin foil played a key role in spontaneously producing a smooth surface. Its sharp contrast in intense absorption and specular light reflection at each wavelength provided a brilliant metallic luster.

Chemical Communications (Cambridge, United Kingdom) published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Related Products of naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Martin, Timothy J. published the artcileHigh Throughput Biodegradation-Screening Test To Prioritize and Evaluate Chemical Biodegradability, HPLC of Formula: 116-63-2, the publication is Environmental Science & Technology (2017), 51(12), 7236-7244, database is CAplus and MEDLINE.

Comprehensive assessment of environmental biodegradability of pollutants is limited by the use of low-throughput systems. These are epitomized by OECD Ready Biodegradability Tests (RBTs), where one sample from an environment may be used to assess a chem.’s ability to readily biodegrade or persist universally in that environment. This neglects the considerable inherent microbial variation spatially and temporally in any environment. Inaccurate designations of biodegradability or persistence can occur as a result. RBTs are central in assessing biodegradation fate of chems. and inferring exposure concentrations in environmental risk assessments. We developed a colorimetric assay for the reliable quantification of suitable aromatic compounds in a high throughput biodegradation screening test (HT-BST). The HT-BST accurately differentiated and prioritized a range of structurally diverse aromatic compounds based on their assigned relative biodegradabilities and Quant. Structure-Activity Relationship (QSAR) model outputs. Approx. 20,000 individual biodegradation tests were performed, returning analogous results to conventional RBTs. The effect of substituent group structure and position on biodegradation potential demonstrated a significant correlation (P<0.05) with Hammett’s constant for substituents on position 3 of the phenol ring. The HT-BST may facilitate the rapid screening of 100,000 chems. reportedly manufactured in Europe and reduce the need for higher-tier fate and effects tests.

Environmental Science & Technology published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, HPLC of Formula: 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Gupta, Pankaj published the artcileGraphene and Co-polymer composite based molecularly imprinted sensor for ultratrace determination of melatonin in human biological fluids, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is RSC Advances (2015), 5(50), 40444-40454, database is CAplus.

A novel molecularly imprinted polymer (MIP) sensor based on a composite of graphene (GR) and a co-polymer of 4-amino-3-hydroxy-1-naphthalenesulfonic acid (AHNSA) and melamine (MM) has been fabricated for detecting melatonin. The MIP film was fabricated by the deposition of a graphene layer on a glassy carbon electrode (GCE) surface followed by electropolymg. AHNSA and MM in the presence of melatonin. The morphol. of the sensor was characterized by using Field Emission-SEM (FE-SEM) and Electrochem. Impedance Spectroscopy (EIS). The electrochem. performance of the imprinted sensor was investigated by using cyclic voltammetry and square wave voltammetry. The electropolymerization conditions, method of template removal, effect of template to monomer ratio and incubation time were optimized. Electrochem. results showed that the oxidation peak current increased linearly with the concentration of melatonin in the range 0.05 to 100 μM L^-1. The detection limit of the imprinted electrochem. sensor towards the melatonin determination is calculated to be 60 × 10^-10 mol L^-1. The suitability of the GR/MIP based sensor has been demonstrated in detecting melatonin in biol. samples.

RSC Advances published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

He, Yantao published the artcileA potent and selective inhibitor for the UBLCP1 proteasome phosphatase, Computed Properties of 116-63-2, the publication is Bioorganic & Medicinal Chemistry (2015), 23(12), 2798-2809, database is CAplus and MEDLINE.

The ubiquitin-like domain-containing C-terminal domain phosphatase 1 (UBLCP1) has been implicated as a neg. regulator of the proteasome, a key mediator in the ubiquitin-dependent protein degradation Small mol. inhibitors that block UBLCP1 activity would be valuable as research tools and potential therapeutics for human diseases caused by the cellular accumulation of misfold/damaged proteins. The authors report a salicylic acid fragment-based library approach aimed at targeting both the phosphatase active site and its adjacent binding pocket for enhanced affinity and selectivity. Screening of the focused libraries led to the identification of the first potent and selective UBLCP1 inhibitor I. Compound I exhibits an IC₅₀ of 1.0 μM for UBLCP1 and greater than 5-fold selectivity against a large panel of protein phosphatases from several distinct families. Importantly, the inhibitor possesses efficacious cellular activity and is capable of inhibiting UBLCP1 function in cells, which in turn up-regulates nuclear proteasome activity. These studies set the groundwork for further developing compound I into chem. probes or potential therapeutic agents targeting the UBLCP1 phosphatase.

Bioorganic & Medicinal Chemistry published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Computed Properties of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Raj, Mamta published the artcileGraphene/conducting polymer nano-composite loaded screen printed carbon sensor for simultaneous determination of dopamine and 5-hydroxytryptamine, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Sensors and Actuators, B: Chemical (2017), 993-1002, database is CAplus.

A novel and sensitive electrochem. method has been developed for the simultaneous determination of dopamine (DA) and 5-hydroxytryptamine (5-HT) using graphene (GR) and poly 4-amino-3-hydroxy-1-naphthalenesulfonic acid modified screen printed carbon sensor. The electrochem. measurements were studied using cyclic voltammetry, square wave voltammetry, whereas the surface morphol. of the modified sensor was characterized by Electrochem. Impedance Spectroscopy and Field Emission SEM. The fabricated sensor facilitated the anal. of DA and 5-HT in the concentration range 0.05-100μM and 0.05-150μM with the detection limit of 2 nM and 3 nM resp. The fabricated sensor has been explored for the determination of 5-HT in the plasma samples and the selectivity of the proposed work has been proved by the anal. of DA and 5-HT in the presence of common metabolites present in biol. fluids. The anal. applicability of the fabricated sensor has also been successfully demonstrated for the simultaneous detection of DA and 5-HT in the pharmacol. formulations, human urine and blood samples.

Sensors and Actuators, B: Chemical published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Sun, Lilin published the artcileIndication of critical micelle concentration of nonionic surfactants with large emission change using water-soluble conjugated polymer as molecular light switch, Quality Control of 18512-55-5, the publication is Journal of Luminescence (2013), 260-265, database is CAplus.

A new near-IR water-soluble conjugated polymer, i.e. poly [2,5-di (propyloxysulfonate)-1,4-phenylene-ethynylene-9,10-anthrylene] (PPEASO3) was synthesized to investigate its interaction with surfactants. It was found that PPEASO3 has only a weak fluorescence emission at about 670 nm due to its self-aggregation in water and in aqueous solution containing a low concentration of nonionic surfactants, i.e. below their critical micelle concentration (CMC). However, a dramatic fluorescence enhancement with a large emission blue-shift (>40 nm) was found once the concentration of nonionic surfactants reached the CMC (especially for Triton X-100). An orange fluorescence could be observed even with naked-eyes under UV-lamp, which gave a direct indication for the micelle forming process and provided a simple method for the CMC determination of the nonionic surfactants. The CMC values determined by this method were in good agreement with those obtained by other techniques. The dramatic emission change observed could be ascribed to the intensive hydrophobic interaction between PPEASO3 and surfactants micelle, which greatly disrupts the aggregation of the polymer and increase the fluorescence efficiency of PPEASO3.

Journal of Luminescence published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C21H24O8, Quality Control of 18512-55-5.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Faroughi Niya, Homayoun published the artcileSynthesis, characterization, and application of CoFe₂O₄@amino-2-naphthol-4-sulfonic acid as a novel and reusable catalyst for the synthesis of spirochromene derivatives, HPLC of Formula: 116-63-2, the publication is Applied Organometallic Chemistry (2021), 35(3), e6119, database is CAplus.

In the present work, 1-amino-2-naphthol-4-sulfonic acid immobilized on functionalized CoFe₂O₄ nanoparticles was successfully synthesized as a new, efficient, and recoverable catalyst and tested for the synthesis of spirochromene derivatives by a simple, green, and inexpensive procedure [e.g., isatin + malononitrile + dimedone â†?I (95%)]. This magnetically heterogeneous nanocatalyst was characterized by various techniques such as Fourier transform IR (FT-IR), thermal gravimetric anal. (TGA)/derivative thermogravimetric (DTG), X-ray diffraction (XRD), X-ray mapping, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), vibrating sample magnetometer (VSM), Brunauer-Emmett-Teller (BET), and SEM analyses. The novel synthesized nanocatalyst can be easily separated and can also be reused several times without appreciable loss in its catalytic activity. Furthermore, in comparison with previous reports, this nanocatalyst showed high thermal stability and acidic properties.

Applied Organometallic Chemistry published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, HPLC of Formula: 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem